CVE-2026-46322tun: free page on build_skb failure in tun_xdp_one()
- 7.1HighCVSS base score
- 0.13%Exploitation in 30 daysEPSS · top 97% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
In the Linux kernel, the following vulnerability has been resolved: tun: free page on build_skb failure in tun_xdp_one() When build_skb() fails in tun_xdp_one(), the function sets ret to -ENOMEM and jumps to the out label, which returns without freeing the page that vhost_net_build_xdp() allocated for the frame. As with the short-frame rejection path, tun_sendmsg() discards the per-buffer error and still returns total_len, so vhost_tx_batch() takes the success path and never frees the page. Each build_skb() failure in a batch leaks one page-frag chunk. Free the page before taking the error path, matching the put_page() the other error exits of tun_xdp_one() already perform.
Timeline
ID reserved
By Linux
- 27 days later
· 27 days later
Published
- 4 months later
· 4 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High7.1 | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H |
| NVDNVD · Modified | 3.1 | High7.1 | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.13% · top 97% of all CVEs (14 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.1.
Affected products
- affected 043d222f93ab8c76b56a3b315cd8692e35affb6c – < 26fe549b5192536b6c1c68a2dfdc8c0dcf9fa4a9
- affected 043d222f93ab8c76b56a3b315cd8692e35affb6c – < 793385c154771603b8671dd8338927221e9d8d78
- affected 043d222f93ab8c76b56a3b315cd8692e35affb6c – < 2638a9c1521905bb5c5d1e95c8fbc09f79148ed7
- affected 043d222f93ab8c76b56a3b315cd8692e35affb6c – < 60d9c0d6cdde5420d6483c921b16fe5465eb5238
- affected 043d222f93ab8c76b56a3b315cd8692e35affb6c – < d16e38fac09a47bfcf98c1ad65a1bb53f94540f5
- affected 043d222f93ab8c76b56a3b315cd8692e35affb6c – < aa308e9dbb9acb17cacdbbce9e4504f69bac8385
- affected 043d222f93ab8c76b56a3b315cd8692e35affb6c – < 4fefc6156a162a9f50035c12091a5e5130c82c6e
- affected 043d222f93ab8c76b56a3b315cd8692e35affb6c – < aa8963fdce667a42fb7f0bdd2909fadcab02f9a8
- affected 4.20
- unaffected < 4.20
- unaffected 5.10.259 – ≤ 5.10.*
- unaffected 5.15.210 – ≤ 5.15.*
- unaffected 6.1.176 – ≤ 6.1.*
- unaffected 6.6.143 – ≤ 6.6.*
- unaffected 6.12.93 – ≤ 6.12.*
- unaffected 6.18.35 – ≤ 6.18.*
- unaffected 7.0.12 – ≤ 7.0.*
- unaffected 7.1 – ≤ *
References
References9
- https://git.kernel.org/stable/c/26fe549b5192536b6c1c68a2dfdc8c0dcf9fa4a9 (opens in a new tab)
- https://git.kernel.org/stable/c/793385c154771603b8671dd8338927221e9d8d78 (opens in a new tab)
- https://git.kernel.org/stable/c/2638a9c1521905bb5c5d1e95c8fbc09f79148ed7 (opens in a new tab)
- https://git.kernel.org/stable/c/60d9c0d6cdde5420d6483c921b16fe5465eb5238 (opens in a new tab)
- https://git.kernel.org/stable/c/d16e38fac09a47bfcf98c1ad65a1bb53f94540f5 (opens in a new tab)
- https://git.kernel.org/stable/c/aa308e9dbb9acb17cacdbbce9e4504f69bac8385 (opens in a new tab)
- https://git.kernel.org/stable/c/4fefc6156a162a9f50035c12091a5e5130c82c6e (opens in a new tab)
- https://git.kernel.org/stable/c/aa8963fdce667a42fb7f0bdd2909fadcab02f9a8 (opens in a new tab)
- https://cert-portal.siemens.com/productcert/html/ssa-784472.html (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-35412 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-46322)Record last updated .